Box



July 3, 1928. v 1,675,414 s. KOF'F BOX Filed Feb. s,' 1926 2 Sheets-Sheet 1 a -17 I \Z I 17y v 7 n j K I w o I: 1

. I H 7 J5 4 1 5 7 1 F wx Km a July 3, 1928.

Filed Feb. 5, 1926 2 Sheets-Sheet 2 Patented July 3, 1928.

UNITED STATES SAMUEL KOFF, 01' NEW YORK, N. Y.

Application filed February 5, 1828. Serial No. 88,321.

The present invention relates to boxes made from paper, cardboard or similar material, more es ecially folding blank boxes, and it is the object of the invention to provide a l folding or collapsible box of novel and improved construction, which ma be made from a single blank, and which Wlll be strong in construction and eflicient in use.

With the foregoing and other objects in view, which will be apparent as the descri tion proceeds, the invention resides in he construction and arrangement of parts, as hereinafter described and claimed, it being understood that changes can be made within the scope of what is claimed, without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawings, wherein Figure 1 is a perspective view of the box in erected or open position.

Fig. 2 is a plan view of the box when folded.

Fig. 3 is a plan view of the blank from which the box is made.

Fig. 4 is a perspective view corresponding to Fig. 1 illustrating a modified form of box.

The box is conveniently and economically constructed from a rectangular blank, as seen in Fig. 3, and comprises the bottom 7, side to walls 8 and end walls 9. The side walls 8 have flaps 10 at their ends folded inwardly and overlapping the inner surfaces of the end walls .9, and the end walls 9 have lips or portions 11 at their upper edges that are folded inwardly against the inner surfaces of said end walls. The flaps 10 occupy the corner portions of the blank between the ends of the walls 8 and 9, and said flaps 10 are of a length equal to the aggregate length of one end wall 9 and its lip 11. As shown in Figs.

1 and 2, the ends of the flaps 10 overlap midway between the side walls.

Each flap 10 has a slit or cut 12 extending bo downwardly from its upper edge to a point between the upper and lower edges of said flap, and the slit 12 is spaced a distance from the corresponding end of the side wall 8 less than the height of the walls. As shown, the distance between the slit 12 and the corresponding end of the side wall is about onehalf the height of the walls. The flap 10 has.

an oblique or inclined fold line 13 extending from the lower end of the slit 12 to the corresponding corner of the bottom 7. The slit c5 12 and fold line 13 define a locking portion 14 extending upwardly along the corresponding end of the sidewall from the fold line 13 to the upper edge of the flap 10.

- The upper edge portions of the fla s 10 beyond the slits 12 overlap the inturne lips '11 substantially flush with the bends between the end walls 9 and their lips 11, and staples 15 or other securing means are engaged through the u per edge portions of the flaps 10, lips 11 an end walls 9, thereby securing them together firmly, with the portions 14 free. The flaps 10 are preferably secured by other staples or securing elements 16 to the end walls 9 below the hps 11 and near the bottom of the box. The flaps 10 stifien and strengthen the end walls, and it will be noted that the upper portions of the flaps 10 are secured to the upper edge portions of the end walls 9 throughout the reater portions of the lengths of the end we ls, excepting at the corners of the box where the portions 14 are located. The corners at the open ends of the slits 12 are preferably cut awa as at 17, to avoid sharp corners and to facihtate the folding and opening of the box.

When the box is erected or opened-the end portions of the lips or flaps 11 which ro- Ject from between the stapled portions of the flaps 10 and end walls 9 are snapped over the upper ends of the portions 14, as seen in Fig. 1, thereby holding the box in erected osition. This provides a firm and strong ox, and it will be noted that the fold lines 13 extend only part way upward from the bottom of the box and terminate a distance below the upper edges of the end walls. The lines of the folds 13 intersect the u per edges of the walls 9 at distances inwar 1y beyond the slits 12, so that said slits are located between said points of intersection and the corners of the box. The flaps 10 may thus be secured to the lips 11 and end walls 9 comparatively close to the corners of the x. By pressing outwardl on the end walls, the box is readil fol ed, the end walls swinging outward y and the side walls inwardly, as seen in Fig. 2. The end portions of the lips 11 snap from over the portions 14, to permit the portions 14 to swing into the planes of the side walls 8, while the remaining port-ions of the flaps 10 remain flatly against the end walls. The intermediate portions of the lips 11 and those portions of the flaps 10 beyond the slits 12 are secured permanentl to the end walls 9 with the lips 11 clamped between said end walls and flaps. This enables the lips 11 to bear snugly against the end walls 9, and, furthermore, the li s 11 being clamped between the flaps and end walls 9 are revented-from being torn loose from the en walls 9. Furthermore, this arrangement will confine the springing or flexing of the lips 11 to those'" portions thereof which are located between the slits 12 and side walls 8, thereby providing a strong and substantial construction.

- The box shown in Fig. 4 is of less height than the box shown in Fig. .1, so that the flaps 10 are shorter, and said flaps are therefore spaced apart at the ends of. the box, instead of abutting or overlapping as shown in Fig. 1.

I side walls, the

surfaces of the end walls, said flaps having slits extending downwardly from their upper edges at distances from the corres nding si e walls less than the hei ht of sald'walls, said flaps having inclined Jld lines between the slits and corners of the bottom, the ortions of the flaps beyond said slits exten ing upwardly and overlapping the intermediate portions of said lips with the lips located between said portions of the flaps and the end walls, and securing means engagin through said end walls, li s and portions 0- the flaps to-clamp the lips tween said ortions of the flaps and end walls and to con me the flexing of the lips away from the end walls to those portions of the lips between said slits and ortions of the flaps at the upper ends of t e slits above said fold lines being cut away to enable such portions to be engaged under the end portions of the lips'when the box is erected.

In testimony whereof I hereunto aflix my signature.

SAMUEL Kori, 

